/*
 * Copyright (C) 2008 ZXing authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package cn.appoa.afimage.zxing.decoding;

import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.Result;

import java.util.Vector;

import cn.appoa.afimage.R;
import cn.appoa.afimage.zxing.camera.CameraManager;
import cn.appoa.afimage.zxing.ui.ZmQRCodeFragment;
import cn.appoa.afimage.zxing.view.ViewfinderResultPointCallback;


/**
 * This class handles all the messaging which comprises the state machine for
 * capture.
 */
public final class CaptureActivityHandler extends Handler {

	private static final String TAG = CaptureActivityHandler.class.getSimpleName();

	private final ZmQRCodeFragment activity;
	private final DecodeThread decodeThread;
	private State state;

	private enum State {
		PREVIEW, SUCCESS, DONE
	}

	public CaptureActivityHandler(ZmQRCodeFragment activity, Vector<BarcodeFormat> decodeFormats, String characterSet) {
		this.activity = activity;
		decodeThread = new DecodeThread(activity, decodeFormats, characterSet,
				new ViewfinderResultPointCallback(activity.getViewfinderView()));
		decodeThread.start();
		state = State.SUCCESS;
		// Start ourselves capturing previews and decoding.
		CameraManager.get().startPreview();
		restartPreviewAndDecode();
	}

	@Override
	public void handleMessage(Message message) {

		if (message.what == R.id.auto_focus) {
			// Log.d(TAG, "Got auto-focus message");
			// When one auto focus pass finishes, start another. This is the
			// closest thing to
			// continuous AF. It does seem to hunt a bit, but I'm not sure what
			// else to do.
			if (state == State.PREVIEW) {
				CameraManager.get().requestAutoFocus(this, R.id.auto_focus);
			}
		}
		if (message.what == R.id.restart_preview) {
			Log.d(TAG, "Got restart preview message");
			restartPreviewAndDecode();
		}
		if (message.what == R.id.decode_succeeded) {
			Log.d(TAG, "Got decode succeeded message");
			state = State.SUCCESS;
			Bundle bundle = message.getData();

			/***********************************************************************/
			Bitmap barcode = bundle == null ? null : (Bitmap) bundle.getParcelable(DecodeThread.BARCODE_BITMAP);// ���ñ����߳�

			activity.handleDecode((Result) message.obj, barcode);// ���ؽ��?
																	// /***********************************************************************/
		}
		if (message.what == R.id.decode_failed) {
			// We're decoding as fast as possible, so when one decode fails,
			// start another.
			state = State.PREVIEW;
			CameraManager.get().requestPreviewFrame(decodeThread.getHandler(), R.id.decode);
		}
		if (message.what == R.id.return_scan_result) {
			Log.d(TAG, "Got return scan result message");
			// activity.setResult(Activity.RESULT_OK, (Intent) message.obj);
			// activity.finish();
		}
		if (message.what == R.id.launch_product_query) {
			Log.d(TAG, "Got product query message");
			String url = (String) message.obj;
			Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
			intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
			activity.startActivity(intent);
		}

//		switch (message.what) {
//		case R.id.auto_focus:
//			// Log.d(TAG, "Got auto-focus message");
//			// When one auto focus pass finishes, start another. This is the
//			// closest thing to
//			// continuous AF. It does seem to hunt a bit, but I'm not sure what
//			// else to do.
//			if (state == State.PREVIEW) {
//				CameraManager.get().requestAutoFocus(this, R.id.auto_focus);
//			}
//			break;
//		case R.id.restart_preview:
//			Log.d(TAG, "Got restart preview message");
//			restartPreviewAndDecode();
//			break;
//		case R.id.decode_succeeded:
//			Log.d(TAG, "Got decode succeeded message");
//			state = State.SUCCESS;
//			Bundle bundle = message.getData();
//
//			/***********************************************************************/
//			Bitmap barcode = bundle == null ? null : (Bitmap) bundle.getParcelable(DecodeThread.BARCODE_BITMAP);// ���ñ����߳�
//
//			activity.handleDecode((Result) message.obj, barcode);// ���ؽ��?
//																	// /***********************************************************************/
//			break;
//		case R.id.decode_failed:
//			// We're decoding as fast as possible, so when one decode fails,
//			// start another.
//			state = State.PREVIEW;
//			CameraManager.get().requestPreviewFrame(decodeThread.getHandler(), R.id.decode);
//			break;
//		case R.id.return_scan_result:
//			Log.d(TAG, "Got return scan result message");
//			// activity.setResult(Activity.RESULT_OK, (Intent) message.obj);
//			// activity.finish();
//			break;
//		case R.id.launch_product_query:
//			Log.d(TAG, "Got product query message");
//			String url = (String) message.obj;
//			Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
//			intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
//			activity.startActivity(intent);
//			break;
//		}
	}

	public void quitSynchronously() {
		state = State.DONE;
		CameraManager.get().stopPreview();
		Message quit = Message.obtain(decodeThread.getHandler(), R.id.quit);
		quit.sendToTarget();
		try {
			decodeThread.join();
		} catch (InterruptedException e) {
			// continue
		}

		// Be absolutely sure we don't send any queued up messages
		removeMessages(R.id.decode_succeeded);
		removeMessages(R.id.decode_failed);
	}

	public void restartPreviewAndDecode() {
		if (state == State.SUCCESS) {
			state = State.PREVIEW;
			CameraManager.get().requestPreviewFrame(decodeThread.getHandler(), R.id.decode);
			CameraManager.get().requestAutoFocus(this, R.id.auto_focus);
			activity.drawViewfinder();
		}
	}

}
